CN201392881Y - Dual-frequency antenna - Google Patents
Dual-frequency antenna Download PDFInfo
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- CN201392881Y CN201392881Y CN 200920009416 CN200920009416U CN201392881Y CN 201392881 Y CN201392881 Y CN 201392881Y CN 200920009416 CN200920009416 CN 200920009416 CN 200920009416 U CN200920009416 U CN 200920009416U CN 201392881 Y CN201392881 Y CN 201392881Y
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Abstract
The utility model relates to a dual-frequency antenna, which is characterized by comprising a substrate, a first radiator and a second radiator, wherein the substrate is provided with a first surface, a second surface and a signal feed-in hole, and the first radiator is formed on the first surface and is connected with the signal feed-in hole; the second radiator is formed on the second surface and is connected with the signal feed-in hole, and both the first radiator and the second radiator comprises at least one first radiating part, at least one second radiating part, and at least one matching path; the matching path of the first radiator penetrates the substrate and is connected with the matching path of the second radiator, and a first length is between the signal feed-in hole and the end of the first radiating part; and a second length is between the signal feed-in hole and the end of the second radiating part.
Description
Technical field
The utility model relates to a kind of dual-band antenna, and impedance matching is done in particularly a kind of layout and coupling path by printed antenna, to have the dual-band antenna of preferable gain.
Background technology
Along with modern society science and technology is constantly progressive,, can reach the effect with the remote-control device Data transmission, for example mobile phone, mobile computer etc. because wireless communication technique has and do not need to connect wire rod.At present antenna mainly is divided into external antenna and in-building type antenna, and the bending owing to external antenna is subjected to external force collision easily, the shortcoming that fractures.Therefore the in-building type antenna becomes a kind of application trend of wireless telecommunications gradually.
The antenna that general electronic products is used roughly has two kinds of plane inverse F type plate aerial and unipole antennas.Because frequency bandwidth, yield value and the radiation efficiency of plane inverse F type plate aerial are directly proportional with volume, therefore with antenna planeization and miniaturization, the frequency bandwidth of antenna and radiation efficiency all can reduce accordingly, in other words, for demand in response to electronic product thin typeization and miniaturization, the working band of the dual-band antenna that the plane inverse F type plate aerial is constituted is narrower, can't cover the working frequency range of IEEE802.11a and IEEE802.11b simultaneously.On the other hand,, must possess bigger grounding parts in use, so can cause the inconvenience of assembling and the restriction of product size when being installed in the limited usage space of electronic product though unipole antenna has bigger frequency band.
The utility model content
Main purpose of the present utility model aims to provide a kind of dual-band antenna, and it has unique signal path layout, and does not need extra matching component, to reach the requirement of preferable antenna performance.Moreover, this dual-band antenna can in be built in the electronic product, more to meet the application demand of product.
In order to achieve the above object, the utility model provides a kind of dual-band antenna, it is characterized in that, comprises:
One substrate, it has a first surface and a second surface, and this substrate is provided with a signal feed-in hole;
One first radiant body, it takes shape in this first surface and is connected in this signal feed-in hole; And
One second radiant body, it takes shape in this second surface and is connected in this signal feed-in hole, this first radiant body and this second radiant body all have at least one first Department of Radiation, at least one second Department of Radiation and at least one coupling path, this substrate is run through to be connected in this coupling path of this second radiant body in this coupling path of this first radiant body, this signal feed-in hole is one first length to the end of this first Department of Radiation, and this signal feed-in hole to the end of this second Department of Radiation is one second length.
Above-mentioned dual-band antenna, wherein, this substrate also comprises one first long limit and one second long limit, this first radiant body is positioned at this signal feed-in hole and this formed zone, first long limit on this first surface, and this second radiant body is positioned at this signal feed-in hole and this formed zone, second long limit on this second surface.
Above-mentioned dual-band antenna, wherein, this first Department of Radiation of this first radiant body is extended towards this first long limit by this signal feed-in hole, bending and hummock extend with similar continuous side along the direction on this first long limit again is so that this signal feed-in hole to the end of this first Department of Radiation of this first radiant body forms this first length; This first Department of Radiation of this second radiant body is extended towards this second long limit by this signal feed-in hole, bending and hummock extend with similar continuous side along the direction on this second long limit again is so that this signal feed-in hole to the end of this first Department of Radiation of this second radiant body forms this first length.
Above-mentioned dual-band antenna, wherein, this second Department of Radiation of this first radiant body is obliquely extended towards this first long limit by this signal feed-in hole, bending and extend along the direction on this first long limit again is so that this signal feed-in hole to the end of this second Department of Radiation of this first radiant body forms this second length; This second Department of Radiation of this second radiant body is obliquely extended towards this second long limit by this signal feed-in hole, bending and extend along the direction on this second long limit again is so that this signal feed-in hole to the end of this second Department of Radiation of this second radiant body forms this second length.
Above-mentioned dual-band antenna, wherein, extend along the direction on this first long limit and this second long limit respectively in this coupling path of this first radiant body and this second radiant body, vertically bends and extends into type again.
Above-mentioned dual-band antenna, wherein, the end of this first Department of Radiation of this first radiant body and this first Department of Radiation of this second radiant body all is shaped to a T type end.
Above-mentioned dual-band antenna, wherein, this first Department of Radiation of this first radiant body is near than this second Department of Radiation of this first radiant body from this first long limit; This first Department of Radiation of this second radiant body is near than this second Department of Radiation of this second radiant body from this second long limit.
Above-mentioned dual-band antenna, wherein, this first radiant body has two first Departments of Radiation, two second Departments of Radiation and two coupling paths, this first Department of Radiation of this first radiant body is extended towards this first long limit by this signal feed-in hole, hummock extend with similar continuous side to two lateral bucklings and along the direction on this first long limit, this two first Department of Radiation then forms the structure of similar T type again; This second Department of Radiation of this first radiant body is obliquely extended to both sides towards this first long limit by this signal feed-in hole, bending and extend again along the direction on this first long limit, and this two second Department of Radiation then forms the structure of similar T type.
Above-mentioned dual-band antenna, wherein, this second radiant body has two first Departments of Radiation, two second Departments of Radiation and two coupling paths, this first Department of Radiation of this second radiant body is extended towards this second long limit by this signal feed-in hole, hummock extend with similar continuous side to two lateral bucklings and along the direction on this second long limit, this two first Department of Radiation then forms the structure of similar inverted T shape again; This second Department of Radiation of this second radiant body is obliquely extended to both sides towards this second long limit by this signal feed-in hole, bending and extend again along the direction on this second long limit, this two second Department of Radiation then forms the structure of similar inverted T shape, and this two couplings path of this first radiant body is run through this substrate respectively to connect this coupling path of its pairing this second radiant body.
Above-mentioned dual-band antenna, wherein, this first length is the quarter-wave of 2.4GHz frequency range, this second length is the quarter-wave of 5GHz frequency range.
As above-mentioned structure, effect of the present utility model is, this first radiant body matches to receive the signal of first frequency range with first Department of Radiation of this second radiant body, and first radiant body matches with second Department of Radiation of this second radiant body to receive the signal of second frequency range, reaching the purpose that receives two-frequency signal, and dual-band antenna of the present utility model has good antenna performance.
Below in conjunction with the drawings and specific embodiments the utility model is described in detail, but not as to qualification of the present utility model.
Description of drawings
Fig. 1 is the front view of the first surface of dual-band antenna of the present utility model;
Fig. 2 is the front view of the second surface of dual-band antenna of the present utility model;
Fig. 3 is the schematic perspective view of dual-band antenna of the present utility model;
Fig. 4 is the S11 test curve figure of dual-band antenna of the present utility model;
Fig. 5 is the Smith Chart figure of dual-band antenna of the present utility model;
Fig. 6 is the curve chart of the voltage standing wave ratio of dual-band antenna of the present utility model;
Fig. 7 and Fig. 7 A are the 2.45GHz of XY plane under the state of horizontal polarization and the field pattern of 5.5GHz of dual-band antenna;
Fig. 8 and Fig. 8 A are the 2.45GHz of XZ plane under the state of horizontal polarization and the field pattern of 5.5GHz of dual-band antenna;
Fig. 9 and Fig. 9 A are the 2.45GHz of YZ plane under the state of horizontal polarization and the field pattern of 5.5GHz of dual-band antenna.
Wherein, Reference numeral
1 dual-band antenna
10 substrates, 100 first surfaces
101 first long limits
102 second long limits
103 second surfaces
11 signal feed-in holes
12 first radiant bodies
13 second radiant bodies
121,131 first Departments of Radiation
122,132 second Departments of Radiation
123,133 coupling paths
20 splicing ears
The LA major axis
Embodiment
Below in conjunction with accompanying drawing structural principle of the present utility model and operation principle are done concrete description:
At first, see also Fig. 1 to shown in Figure 3, the utility model proposes a kind of dual-band antenna 1, this dual-band antenna 1 can be obtained preferable signal receiving feature.This dual-band antenna 1 comprises: a substrate 10, one first radiant body 12 and one second radiant body 13 are formed, and this substrate 10 is provided with a signal feed-in hole 11.Please refer to Fig. 1, it is the front view of the first surface 100 of this substrate 10; As shown in the figure, this first radiant body 12 takes shape on this first surface 100, and this first radiant body 12 is connected in this signal feed-in hole 11.On the other hand, refer again to Fig. 2, it is the front view of the second surface 103 of this substrate 10; As shown in the figure, this second radiant body 13 takes shape on this second surface 103, and this second radiant body 13 is connected in this signal feed-in hole 11, therefore, and by the signal processing aspect that first above-mentioned radiant body 12 and cooperating of second radiant body 13 can reach preferable.
In the utility model, this first radiant body 12 has at least one first Department of Radiation 121, at least one second Department of Radiation 122 and at least one coupling path 123; This second radiant body has and first radiant body, 12 corresponding at least one first Departments of Radiation 131, at least one second Department of Radiation 132 and at least one coupling path 133, and this coupling path 123 of this first radiant body 12 is to run through this substrate 10 to be connected in this coupling path 133 of this second radiant body 13, and these signal feed-in hole 11 ends to this first Department of Radiation 121 form one first length, this signal feed-in hole 11 to the end of this second Department of Radiation 122 is one second length, and the condition of this first length and second length can allow this dual-band antenna 1 receive the signal of two frequency ranges.
Please refer to Fig. 1 and Fig. 2, it is a most preferred embodiment of the present utility model, and wherein, this first radiant body 12 has two first Departments of Radiation 121, two second Departments of Radiation 122 and two coupling paths 123; Similarly, this second radiant body 13 has corresponding two first Departments of Radiation 131, two second Departments of Radiation 132 and two coupling paths 133.But in other embodiments, only there are the first single Department of Radiation 121, second Department of Radiation 122 and coupling path 123 can have suitable excellent reception effect equally, so the following description describes with regard to the first single Department of Radiation 121, second Department of Radiation 122 and coupling path 123 earlier.
In one embodiment, this substrate 10 is a rectangular circuit board, and it is the FR4 material, but does not exceed with above-mentioned; And this substrate 10 comprises one first long limit 101 and one second long limit 102, this first radiant body 12 is positioned at this signal feed-in hole 11 and these 101 formed zones, first long limit on this first surface 100, in other words, this signal feed-in hole 11 is positioned on the geometric center of this substrate 10 (mid point of longitudinal axis L A) best, this first radiant body 12 then is positioned at the longitudinal axis L A of this substrate 10 and the zone (in brief, 12 of this first radiant bodies are positioned at first zone of the first surface 100 of this substrate 10) that this 101 formed zones, first long limit are surrounded; On the other hand, this second radiant body 13 is positioned at this signal feed-in hole 11 and these 102 formed zones, second long limit on this second surface 103, that is this second radiant body 13 is positioned at second zone of this second surface 103.
This first Department of Radiation 121 of this first radiant body 12 is extended towards this first long limit 101 by this signal feed-in hole 11, bending and hummock extend the layout of snake shape electrode (or be called) with similar continuous side again along the direction on this first long limit 101, so that this signal feed-in hole 11 to the end of this first Department of Radiation 121 of this first radiant body 12 forms this first length, in other words, the first single Department of Radiation 121 can be considered down the shape of L, and this adjutage that falls the first L shaped Department of Radiation 121 has the aspect that repeats to bend.Accordingly, this first Department of Radiation 131 of this second radiant body 13 is extended towards this second long limit 102 by this signal feed-in hole 11, bending and hummock extend with similar continuous side again along the direction on this second long limit 102, so that this signal feed-in hole 11 to the end of this first Department of Radiation 131 of this second radiant body 13 forms this first length, so this first Department of Radiation 131 of this second radiant body 13 is roughly a L shaped structure.And the quarter-wave that this first length is the 2.4GHz frequency range, so 131 of this first Departments of Radiation of this first Department of Radiation 121 of this first radiant body 12 and this second radiant body 13 can cooperatively interact to receive the signal of 2.4GHz frequency range.Moreover the end of the end of this first Department of Radiation 121 of this first radiant body 12 and this first Department of Radiation 131 of this second radiant body 13 then is shaped to a T type end.
On the other hand, this second Department of Radiation 122 of this first radiant body 12 is obliquely extended towards this first long limit 101 by this signal feed-in hole 11, bending and extend along the direction on this first long limit 101 again is so that this signal feed-in hole 11 to the end of this second Department of Radiation 122 of this first radiant body 12 forms second length.Please refer to Fig. 1, it is wide line width that this second Department of Radiation 122 of this first radiant body 12 has than first Department of Radiation 121, and the outward appearance of this second Department of Radiation 122 is haply to should first Department of Radiation 121 and become the shape that is similar to down L, but there is no the configuration of continuous square wave shape on this second Department of Radiation 122, and first Department of Radiation 121 than this second Department of Radiation 122 more near this first long limit 101.Accordingly, this second Department of Radiation 132 of this second radiant body 13 is obliquely extended towards this second long limit 102 by this signal feed-in hole 11, bending and extend again along the direction on this second long limit 102, so that this signal feed-in hole 11 to the end of this second Department of Radiation 132 of this second radiant body 13 forms second length, 132 of this second Departments of Radiation of this second radiant body 13 are to should first Department of Radiation 131 and become the shape of similar L, but second Department of Radiation 132 there is no the configuration of continuous square wave shape, and first Department of Radiation 131 than this second Department of Radiation 132 more near this second long limit 102.In addition, this second length is the quarter-wave of 5GHz frequency range, and therefore this second Department of Radiation 122 of first radiant body 12 matches with this second Department of Radiation 132 of second radiant body 13 and can receive the signal of 5GHz frequency range.
Again on the one hand, extend along the direction on this first long limit 101 in this coupling path 123 of first radiant body 12, vertically bends and extends into type again; Similarly, also extend along the direction on this second long limit 102 in the coupling path 133 of this second radiant body 13, vertically bend and extend into type again, and be provided with perforation on this substrate 10 at this longitudinal axis L A place, 133 in this coupling path 123 of this first radiant body 12 and the coupling path of this second radiant body 13 by this perforation to be connected with each other.
By first Department of Radiation, 121,131, the second Departments of Radiation 122,132 and the coupling path 123,133 of 13 corresponding shapings of this above-mentioned first radiant body 12 and second radiant body, this dual-band antenna 1 can be in order to receive the signal of 2.4GHz frequency range and 5GHz frequency range.
Refer again to Fig. 1 to Fig. 3, in most preferred embodiment of the present utility model, this first radiant body 12 has two first Departments of Radiation 121, two second Departments of Radiation 122 and two coupling paths 123; Similarly, this second radiant body 13 has corresponding two first Departments of Radiation 131, two second Departments of Radiation 132 and two coupling paths 133, and each above-mentioned configuration all is same as above-mentioned explanation, is not just given unnecessary details at this.Among Fig. 1,121 structures that form similar T type of this two first Department of Radiation of first radiant body 12, these two second Departments of Radiation, 122 same structures that form similar T type of first radiant body 12; Among Fig. 2, this two first Department of Radiation of second radiant body 13 then forms the structure of similar inverted T shape, and this two second Department of Radiation of second radiant body 13 then forms the structure of similar inverted T shape equally; Moreover this two couplings path 123 of first radiant body 12 is run through this substrate respectively to connect the coupling path 133 of its pairing second radiant body 13.And among Fig. 3, a splicing ear 20 is inserted in this signal feed-in hole 11, and this splicing ear 20 is in order to connect other electronic installation; And in the present embodiment, the center conductor of this splicing ear 20 is connected in this first radiant body 12 with the transmission forward signal; And the outside netting twine of this splicing ear 20 is connected in this second radiant body 13 with the transmission negative-going signal.
The antenna performance of above-mentioned dual-band antenna 1 below will be described.
Please refer to Fig. 4, it is the return loss (return loss) of the S11 resolution chart of dual-band antenna 1 of the present utility model with the performance antenna, wherein this dual-band antenna 1 at the return loss of two signal frequency ranges all less than-10dB (the expression energy loss is less than 10%); For instance, when frequency was 2.5GHz, return loss was-13.99dB; And frequency is when being 5.5GHz, and return loss is-28.34dB that in other words, the impedance of this dual-band antenna 1 all meets the specification requirement of general antenna in 2.4GHz frequency range and 5GHz frequency range.
In addition, Fig. 5 then shows the Smith Chart figure of dual-band antenna 1, and on behalf of the test point of 2.4GHz frequency range and 5GHz frequency range, its mid point 1 to point 6 be in the dotted line scope in figure, for example put 3 data and be (2.5GHz, 60.79 Ω, 20.08 Ω, 1278nH); Point 5 data be (5.5GHz, 52.47 Ω, 3.447 Ω, 99.76nH), in other words, show the 2.4GHz frequency range and the 5GHz frequency range of this dual-band antenna 1 all meet the specification requirement of general antenna.
Fig. 6 is the test curve of the voltage standing wave ratio (VSWR) of dual-band antenna 1 of the present utility model, and wherein less than 2 (%), for instance, when frequency was 2.5GHz, voltage standing wave ratio was 1.503 (%) to this dual-band antenna 1 in the voltage standing wave ratio of two signal frequency ranges; And frequency is when being 5.5GHz, and voltage standing wave ratio is 1.084 (%), and in other words, the voltage standing wave ratio of this dual-band antenna 1 all meets the specification requirement of general antenna in 2.4GHz frequency range and 5GHz frequency range.
Below also disclose the gain and the field pattern thereof under various polarization aspects of this dual-band antenna 1, following test result with dual-band antenna 1 be installed on the product the actual result who records.
Please refer to table 1, Fig. 7 and Fig. 7 A, it is gain and the field pattern (only draw 2.45GHz and 5.5GHz) thereof of XY plane under the state of horizontal polarization of dual-band antenna 1.
Table 1
| Frequency (GHz) | 2.4 | 2.45 | 2.5 | 4.9 | 5.15 | 5.35 | 5.5 | 5.725 | 5.85 |
| peak gain(dBi) | 0.08 | 0.11 | 1.35 | 2.57 | 2.85 | 2.27 | 1.99 | 1.5 | -0.16 |
Please refer to table 2, Fig. 8 and Fig. 8 A, it is gain and the field pattern (only draw 2.45GHz and 5.5GHz) thereof of XZ plane under the state of horizontal polarization of dual-band antenna 1.
Table 2
| Frequency (GHz) | 2.4 | 2.45 | 2.5 | 4.9 | 5.15 | 5.35 | 5.5 | 5.725 | 5.85 |
| peak gain(dBi) | 0.75 | 0.83 | 0.51 | 2.95 | 3.01 | 2.64 | 2.27 | 2.01 | 2.22 |
Please refer to table 3, Fig. 9 and Fig. 9 A, it is gain and the field pattern (only draw 2.45GHz and 5.5GHz) thereof of YZ plane under the state of horizontal polarization of dual-band antenna 1.
Table 3
| Frequency (GHz) | 2.4 | 2.45 | 2.5 | 4.9 | 5.15 | 5.35 | 5.5 | 5.725 | 5.85 |
| peak gain(dBi) | 0.52 | -0.09 | -1.11 | 0.46 | 1.44 | 2.42 | 2.78 | -0.01 | -0.62 |
In sum, the utlity model has following all advantage:
1, the layout of dual-band antenna of the present utility model can provide the good signal transmission characteristic, and does not need extra matching component.
2, dual-band antenna of the present utility model can be contained 2.4GHz frequency range and 5GHz frequency range simultaneously, and reaches optimal antenna gain and voltage standing wave ratio (VSWR is less than 2), gets so that this dual-band antenna has stable operating efficiency.
Certainly; the utility model also can have other various embodiments; under the situation that does not deviate from the utility model spirit and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the utility model, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the utility model.
Claims (10)
1, a kind of dual-band antenna is characterized in that, comprises:
One substrate, it has a first surface and a second surface, and this substrate is provided with a signal feed-in hole;
One first radiant body, it takes shape in this first surface and is connected in this signal feed-in hole; And
One second radiant body, it takes shape in this second surface and is connected in this signal feed-in hole, this first radiant body and this second radiant body all have at least one first Department of Radiation, at least one second Department of Radiation and at least one coupling path, this substrate is run through to be connected in this coupling path of this second radiant body in this coupling path of this first radiant body, this signal feed-in hole is one first length to the end of this first Department of Radiation, and this signal feed-in hole to the end of this second Department of Radiation is one second length.
2, dual-band antenna according to claim 1, it is characterized in that, this substrate also comprises one first long limit and one second long limit, this first radiant body is positioned at this signal feed-in hole and this formed zone, first long limit on this first surface, and this second radiant body is positioned at this signal feed-in hole and this formed zone, second long limit on this second surface.
3, dual-band antenna according to claim 2, it is characterized in that, this first Department of Radiation of this first radiant body is extended towards this first long limit by this signal feed-in hole, bending and hummock extend with similar continuous side along the direction on this first long limit again is so that this signal feed-in hole to the end of this first Department of Radiation of this first radiant body forms this first length; This first Department of Radiation of this second radiant body is extended towards this second long limit by this signal feed-in hole, bending and hummock extend with similar continuous side along the direction on this second long limit again is so that this signal feed-in hole to the end of this first Department of Radiation of this second radiant body forms this first length.
4, dual-band antenna according to claim 3, it is characterized in that, this second Department of Radiation of this first radiant body is obliquely extended towards this first long limit by this signal feed-in hole, bending and extend along the direction on this first long limit again is so that this signal feed-in hole to the end of this second Department of Radiation of this first radiant body forms this second length; This second Department of Radiation of this second radiant body is obliquely extended towards this second long limit by this signal feed-in hole, bending and extend along the direction on this second long limit again is so that this signal feed-in hole to the end of this second Department of Radiation of this second radiant body forms this second length.
5, dual-band antenna according to claim 4 is characterized in that, extend along the direction on this first long limit and this second long limit respectively in this coupling path of this first radiant body and this second radiant body, vertically bends and extends into type again.
6, dual-band antenna according to claim 2 is characterized in that, the end of this first Department of Radiation of this first radiant body and this first Department of Radiation of this second radiant body all is shaped to a T type end.
7, dual-band antenna according to claim 2 is characterized in that, this first Department of Radiation of this first radiant body is near than this second Department of Radiation of this first radiant body from this first long limit; This first Department of Radiation of this second radiant body is near than this second Department of Radiation of this second radiant body from this second long limit.
8, dual-band antenna according to claim 2, it is characterized in that, this first radiant body has two first Departments of Radiation, two second Departments of Radiation and two coupling paths, this first Department of Radiation of this first radiant body is extended towards this first long limit by this signal feed-in hole, hummock extend with similar continuous side to two lateral bucklings and along the direction on this first long limit, this two first Department of Radiation then forms the structure of similar T type again; This second Department of Radiation of this first radiant body is obliquely extended to both sides towards this first long limit by this signal feed-in hole, bending and extend again along the direction on this first long limit, and this two second Department of Radiation then forms the structure of similar T type.
9, dual-band antenna according to claim 8, it is characterized in that, this second radiant body has two first Departments of Radiation, two second Departments of Radiation and two coupling paths, this first Department of Radiation of this second radiant body is extended towards this second long limit by this signal feed-in hole, hummock extend with similar continuous side to two lateral bucklings and along the direction on this second long limit, this two first Department of Radiation then forms the structure of similar inverted T shape again; This second Department of Radiation of this second radiant body is obliquely extended to both sides towards this second long limit by this signal feed-in hole, bending and extend again along the direction on this second long limit, this two second Department of Radiation then forms the structure of similar inverted T shape, and this two couplings path of this first radiant body is run through this substrate respectively to connect this coupling path of its pairing this second radiant body.
10, dual-band antenna according to claim 2 is characterized in that, this first length is the quarter-wave of 2.4GHz frequency range, and this second length is the quarter-wave of 5GHz frequency range.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200920009416 CN201392881Y (en) | 2009-03-25 | 2009-03-25 | Dual-frequency antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200920009416 CN201392881Y (en) | 2009-03-25 | 2009-03-25 | Dual-frequency antenna |
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| Publication Number | Publication Date |
|---|---|
| CN201392881Y true CN201392881Y (en) | 2010-01-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200920009416 Expired - Fee Related CN201392881Y (en) | 2009-03-25 | 2009-03-25 | Dual-frequency antenna |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102280693A (en) * | 2010-06-10 | 2011-12-14 | 长盛科技股份有限公司 | Circularly polarized panel antenna |
| CN103794883A (en) * | 2013-03-28 | 2014-05-14 | 深圳光启创新技术有限公司 | Directional antenna |
-
2009
- 2009-03-25 CN CN 200920009416 patent/CN201392881Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102280693A (en) * | 2010-06-10 | 2011-12-14 | 长盛科技股份有限公司 | Circularly polarized panel antenna |
| CN103794883A (en) * | 2013-03-28 | 2014-05-14 | 深圳光启创新技术有限公司 | Directional antenna |
| CN103794883B (en) * | 2013-03-28 | 2015-04-15 | 深圳光启创新技术有限公司 | Directional antenna |
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